%0 Journal Article %1 SteinleNeubrech15 %A Steinle, Tobias %A Neubrech, Frank %A Steinmann, Andy %A Yin, Xinghui %A Giessen, Harald %D 2015 %I OSA %J Opt. Express %K myown %N 9 %P 11105--11113 %R 10.1364/OE.23.011105 %T Mid-infrared Fourier-transform spectroscopy with a high-brilliance tunable laser source: investigating sample areas down to 5 µm diameter %U http://www.opticsexpress.org/abstract.cfm?URI=oe-23-9-11105 %V 23 %X We demonstrate highly sensitive infrared spectroscopy of sample volumes close to the diffraction limit by coupling a femtosecond fiber-feedback optical parametric oscillator (OPO) to a conventional Fourier-transform infrared (FTIR) spectrometer. The high brilliance and long-term stable infrared radiation with 1/e2-bandwidths up to 125 nm is easily tunable between 1.4 µm and 4.2 µm at 43 MHz repetition rate and thus enables rapid and low-noise infrared spectroscopy. We demonstrate this by measuring typical molecular vibrations in the range of 3 µm. Combined with surface-enhanced infrared spectroscopy, where the confined electromagnetic near-fields of resonantly excited metal nanoparticles are employed to enhance molecular vibrations, we realize the spectroscopic detection of a molecular monolayer of octadecanethiol. In comparison to conventional light sources and synchrotron radiation, our compact table-top OPO system features a significantly improved performance making it highly suitable for rapid analysis of minute amounts of molecular species in life science and medicine laboratories.

@article{SteinleNeubrech15, abstract = {We demonstrate highly sensitive infrared spectroscopy of sample volumes close to the diffraction limit by coupling a femtosecond fiber-feedback optical parametric oscillator (OPO) to a conventional Fourier-transform infrared (FTIR) spectrometer. The high brilliance and long-term stable infrared radiation with 1/e2-bandwidths up to 125 nm is easily tunable between 1.4 µm and 4.2 µm at 43 MHz repetition rate and thus enables rapid and low-noise infrared spectroscopy. We demonstrate this by measuring typical molecular vibrations in the range of 3 µm. Combined with surface-enhanced infrared spectroscopy, where the confined electromagnetic near-fields of resonantly excited metal nanoparticles are employed to enhance molecular vibrations, we realize the spectroscopic detection of a molecular monolayer of octadecanethiol. In comparison to conventional light sources and synchrotron radiation, our compact table-top OPO system features a significantly improved performance making it highly suitable for rapid analysis of minute amounts of molecular species in life science and medicine laboratories.}, added-at = {2021-02-23T13:22:41.000+0100}, author = {Steinle, Tobias and Neubrech, Frank and Steinmann, Andy and Yin, Xinghui and Giessen, Harald}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/2a8a85c316e321f34a4a0925205dbc516/andy.steinmann}, doi = {10.1364/OE.23.011105}, interhash = {ec4cb5b2e9081422d4bee266eca2ce04}, intrahash = {a8a85c316e321f34a4a0925205dbc516}, journal = {Opt. Express}, keywords = {myown}, month = may, number = 9, pages = {11105--11113}, publisher = {OSA}, timestamp = {2021-02-23T12:22:41.000+0100}, title = {Mid-infrared Fourier-transform spectroscopy with a high-brilliance tunable laser source: investigating sample areas down to 5 µm diameter}, url = {http://www.opticsexpress.org/abstract.cfm?URI=oe-23-9-11105}, volume = 23, year = 2015 }